What happens when you cancel or kill a resumable index creation?
SQL Server 2019 adds resumable online index creation, and it’s pretty spiffy according to Brent.
2019-04-11
Indexing
Are nulls stored in a nonclustered index?
When you index a nullable field, are the rows with nulls stored in the index? It’s easy enough to find out by creating a table with a nullable field, and then creating an index on it.
2019-03-29
2019-03-28
396 reads
Can deleting rows make a table…bigger?
Michael J. Swart posted an interesting question: he had a large table with 7.5 billion rows and 5 indexes. When he deleted 10 million rows, he noticed that the indexes were getting larger, not smaller.
2019-03-22
2,752 reads
2018-11-09
818 reads
Unused Indexes - Are they really unused or have they just not been used YET?
Tara explains when index DMVs gets reset by telling a story from her dark past.
2018-11-09
3,197 reads
Index Tuning Week: How Many Indexes Are Too Many?
When you're not sure, start by aiming for 5 or less indexes per table, with 5 or less fields each.
2018-11-02
4,276 reads
2018-10-29 (first published: 2018-10-19)
1,433 reads
2018-08-30
828 reads
2018-08-23
860 reads
Blogs
AI: Blog a Day – Day 5: Notebooks, Hugging face models and Fine Tuning
By Vinay Thakur
Continuing from Day 4 where we learned Encoder, Decoder, and Attention Mechanism, today we...
AI: Blog a Day – Day 4: Transformers – Encoder, Decoder, and Attention
By Vinay Thakur
Continuing from Day 3 where we covered LLM models open/closed and their parameters, Today...
Flyway Tips: Multiple Projects
By Steve Jones
One of the nice things about Flyway Desktop is that it helps you manage...
Forums
Can an Azure App Service Managed Identity be used for SQL Login?
I'm fairly certain I know the answer to this from digging into it yesterday,...
Azure Synapse database refresh
Hi Team, I am trying to refresh the Azure Synapse Dedicated pool from production...
how to write this query?
hi everyone I am not sure how to write the query that will produce...
Question of the Day
Fun with JSON I
I have some data in a table:
CREATE TABLE #test_data
(
id INT PRIMARY KEY,
name VARCHAR(100),
birth_date DATE
);
-- Step 2: Insert rows
INSERT INTO #test_data
VALUES
(1, 'Olivia', '2025-01-05'),
(2, 'Emma', '2025-03-02'),
(3, 'Liam', '2025-11-15'),
(4, 'Noah', '2025-12-22');
If I run this query, how many rows are returned?
SELECT *
FROM OPENJSON(
(
SELECT t.* FROM #test_data AS t FOR JSON PATH
)
) t; See possible answers